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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2024
Goodwill and Other Intangible Assets |
Goodwill (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Retirement |  | Principal |  | ​ | ​ |  | ​ |  | ​ | ​
​ | ​ | and Income | ​ | Asset | ​ | Benefits and | ​ | ​ | ​ | ​ | ​
​ | ​ | Solutions | ​ | Management | ​ | Protection | ​ | Corporate | ​ | Consolidated
​ | ​ | (in millions)
Balance as of January 1, 2023 | ​ | $ | 675.9 | ​ | $ | 892.8 | ​ | $ | 29.5 | ​ | $ | — | ​ | $ | 1,598.2
Foreign currency | ​ | ​ | — | ​ | ​ | 10.3 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 10.3
Balance as of December 31, 2023 | ​ | ​ | 675.9 | ​ | ​ | 903.1 | ​ | ​ | 29.5 | ​ | ​ | — | ​ | ​ | 1,608.5
Goodwill from acquisitions (1) | ​ | ​ | 11.3 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 11.3
Foreign currency | ​ | ​ | — | ​ | ​ | (70.1) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (70.1)
Balance as of December 31, 2024 | ​ | $ | 687.2 | ​ | $ | 833.0 | ​ | $ | 29.5 | ​ | $ | — | ​ | $ | 1,549.7
(1) | Relates to the acquisition of employee stock ownership plan business from Ascensus within our Retirement and Income Solutions segment.
Finite Lived Intangible Assets (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2024 |  | 2023
​ | ​ | (in millions)
Gross carrying value | ​ | $ | 1,157.9 | ​ | $ | 1,215.1
Accumulated amortization | ​ |  | 523.1 | ​ | ​ | 512.7
Net carrying value | ​ | $ | 634.8 | ​ | $ | 702.4
Other Finite Lived Intangible Assets Estimated Amortization Expense (Table) | As of December 31, 2024, the estimated amortization expense for the next five years is as follows (in millions): ​
​ | ​ | ​ | ​
Year ending December 31: |  | ​ | ​
2025 | ​ | $ | 60.1
2026 | ​ | ​ | 56.1
2027 | ​ | ​ | 55.9
2028 | ​ | ​ | 40.9
2029 | ​ | ​ | 39.6

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